Los Angeles County sheriff's deputies are investigating a complaint that Canadian pop sensation Justin Bieber roughed up a man who was taking pictures of the performer at a suburban shopping centre, police said on Monday.

Deputies were called on Sunday to an outdoor shopping area in Calabasas, about 23 miles northwest of Hollywood, by a man who reported having just had an altercation with Bieber, the sheriff's department said in a press statement.

According to the statement, the man said he was taking pictures of Bieber, who was with his girlfriend, actress Selena Gomez, when the singer "physically battered" him.

Bieber's publicist with Island/Def Jam Music Group could not immediately be reached for comment.

A spokeswoman for the sheriff's department, Lillian Peck, declined to give further details about the nature of the alleged confrontation or any injuries suffered by the man.

But Peck said the man, who was not identified by police, complained of pain, and after requesting medical attention was treated on the scene by paramedics, then taken to a local hospital, where he was examined and later released. - Telegraph UK article